(This is an experiment.) Think of this blog as a message board on the old platform. If you want to leave an open message, that everybody can see (and snoop!) as we did before - why not do it this way. We each can copy the link or bookmark it to each person's "Message Board" Blog. If we are all consistent in our titles "Username's Message Board" then we could easily search for that specific blog and visit any time we want and leave replies. AND, as I believe there is no limit to the threading - you never have any comments that will drop off.
Just a passing thought.....